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A method and system for synchronizing air interface synchronization between base stations

A technology for air interface synchronization and between base stations, which is applied to communication between multiple stations, transmission systems, synchronization devices, etc. It can solve problems such as difficult access, frequent changes of base stations, and inability to achieve synchronization adjustments, etc., and achieves the effect of a simple method

Active Publication Date: 2008-02-13
DATANG MOBILE COMM EQUIP CO LTD
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AI Technical Summary

Problems solved by technology

However, it is difficult to determine the location of the base station under certain circumstances. For example, GPS is not available, and the base station needs to change its location frequently. In this way, the air interface propagation delay between base stations is difficult to obtain, and the air interface propagation delay between base stations cannot be obtained. Unable to achieve synchronization adjustment

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  • A method and system for synchronizing air interface synchronization between base stations
  • A method and system for synchronizing air interface synchronization between base stations
  • A method and system for synchronizing air interface synchronization between base stations

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Embodiment Construction

[0071] In the present invention, a base station that can be used as a synchronization reference in the system is called a seed base station or a primary base station, and other base stations that need to be synchronized with the seed base station are called secondary base stations.

[0072] The core idea of ​​the present invention is: from the base station to realize the downlink synchronization with the seed base station directly through the air interface cell search, and simultaneously obtain the synchronization of the system frame number (SFN); then send the uplink pilot sequence SYNC_UL from the base station to the seed base station, and The information UpPCH in the fast physical access channel burst responded by the base station POS , to calculate the air interface propagation delay between base stations. On the basis of realizing the downlink synchronization with the seed base station, the internal timing of the slave base station itself is adjusted according to the air ...

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Abstract

The invention discloses a method for realizing air interface synchronization between base stations. The method comprises: realizing downlink synchronization between the base station and the seed base station, and completing the synchronization with the system frame number of the seed base station according to the system broadcast information of the seed base station; The base station sends the uplink pilot sequence, and the seed base station responds to the fast physical access channel burst to the slave base station after receiving the uplink pilot sequence; the slave base station calculates Inter-base station air interface propagation delay; the slave base station adjusts its own internal timing according to the inter-base station air interface propagation delay to obtain inter-base station air interface synchronization. The present invention can determine air interface propagation time delay between base stations without determining base station location information, and the method is simple and practical.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a method and system for realizing air interface synchronization between base stations. Background technique [0002] The 3rd Generation Partnership Project (3GPP) TS25.402 (R5 version) describes a scheme for realizing synchronization between base stations of a Time Division Synchronous Code Division Multiple Access (TD-SCDMA) system through the air interface. In this scheme, the synchronization process through the air interface is divided into The three phases are the preparatory phase, the initial synchronization phase and the steady state phase. [0003] 1. Preparatory stage [0004] In the preparatory stage, each radio network subsystem (Radio Network System, RNS) has at least one cell (Cell) synchronized with an external reference clock, such as: the external reference clock Global Positioning System (GPS), and this cell is called the primary cell here...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/26H04L7/00H04Q7/30
Inventor 刘贤
Owner DATANG MOBILE COMM EQUIP CO LTD
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